Solar collector



FIG. 1 is a perspective view of a solar collector showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom perspective view thereof;

FIG. 5 is a top perspective view thereof; and,

FIG. 6 is a side elevation view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

The ornamental design for a solar collector, as shown and described. 